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Numeric Verification Code Generator

Used by developers, writers, and creators worldwide.

A numeric verification code generator saves real time when you need realistic OTP-style codes without spinning up an authentication backend. Developers, QA engineers, and UX designers all hit the same wall: registration flows, onboarding screens, and test fixtures need codes that look authentic but carry zero security risk. This generator gives you three controls: digit length, batch count, and a group separator (none, dash, or space). That separator detail matters — 483-920 reads faster in a prototype and reduces transcription errors on small screens. Set your digit length to match your target system, generate as many codes as you need, and paste the output directly into your mockup or test fixture.

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How to use

  1. Choose your options above
  2. Click Generate
  3. Copy your result

Detailed instructions

  1. Set 'Number of Digits' to match the code length used by the system you are testing or mocking up (6 is standard for OTPs).
  2. Enter the quantity of codes you need in 'How Many' — generate more than you think you need to avoid rerunning.
  3. Choose a 'Group Separator' (dash or space) if your UI displays codes in grouped format, or leave it as None for a plain string.
  4. Click Generate and review the output list to confirm the format matches your target use case.
  5. Copy the generated codes and paste them into your prototype, test fixture, seed file, or documentation.

Use Cases

  • •Populating a Figma onboarding prototype with 6-digit SMS verification codes
  • •Seeding a Cypress test suite with 50 unique OTP codes for login flow assertions
  • •Filling a Storybook component story with dash-separated codes to preview input field formatting
  • •Generating 8-digit backup recovery codes for a user documentation or help-center screenshot
  • •Creating space-separated 4-digit PINs for printed event-access badges to reduce transcription errors

Tips

  • →Match your digit count to the real system: 6 for SMS OTP, 4 for PIN fields, 8-10 for backup tokens — mismatched lengths look wrong in UI reviews.
  • →Use the dash separator when pasting codes into Figma or design tools; grouped codes draw the eye and make mockups feel production-grade.
  • →Generate at least 20% more codes than you think you need for test scripts — edge case tests often consume extras unexpectedly.
  • →For documentation screenshots, 6-digit codes with no separator are the most universally recognizable format across international audiences.
  • →Avoid reusing the same code list across multiple test sessions; refresh the batch each run to prevent false positives from cached state in your test environment.
  • →If you need codes that look like bank transaction PINs (4 digits, no separator), that combination also passes basic regex validation for most PCI-adjacent UI testing.

FAQ

how many digits should an OTP code be for testing

Six digits is the standard for most OTP implementations and the right default if you're matching a common SMS 2FA flow. Use 4 digits for PIN-style fields and 8–10 digits when mocking up backup recovery tokens. Mirror whatever length your real system uses so test data stays consistent.

can I use these codes for real two-factor authentication

No — these are static random numbers, not time-based TOTP codes. Real 2FA codes follow RFC 6238, expire every 30 seconds, and are derived from a shared secret using HMAC-SHA1. Use a library like otplib or pyotp in production; use this generator only for UI mockups, seed data, and test fixtures.

what does the group separator option actually change

It splits digits into chunks — for example, 394817 becomes 394-817 with a dash or 394 817 with a space. Grouped codes reduce read-and-retype errors, especially on mobile, and look more polished in prototypes. Skip the separator if your target system displays codes as a single unbroken string.